The Cadet is a nice smooth shaver less than $30.
Merkur 1904 is nice if you want a new razor. Mild and easy to handle.
Gillette Super Speed
Gillette Tech
Gillette NEW
Gillette Slim (if you're lucky)
Gillette Old Type (if you like aggressive razors)
I think that's it, for less than $35.
As you can see, there are a LOT of nice razors available for 35 bones. Are you looking for anything particular?
+1Can't believe nobody's mentioned the Lord L6. A great razor for under $20.